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iTunes audio/video drifts out-of-sync

I have for a while been having problems with watching videos I have downloaded from the iTunes Store on my PC. I'm running windows 7, all my drivers are up to date, and the videos play fine if I open them up in Quicktime. If I watch them in iTunes, however, the audio and video get out of sync rather rapidly... If I watch a show in iTunes, I need to pause and restart it every 30 seconds or so, otherwise it just becomes too annoying to watch. Clicking pause then play again syncs it back up, but again it doesn't last long. I open the files in Quicktime and they play just fine, and considering iTunes just uses Quicktime for video playback, the problem must be with iTunes. I have gone through several iTunes updates, hoping with each one that the problem gets fixed, but it never does... can anyone help me??

Posted on May 2, 2011 12:41 PM

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Posted on Oct 6, 2011 5:14 PM

After many months of pulling my hair out, Mr Me has shed some light on the problem (at least for me). I am using Realtek High Definition Audio and i discovered that it was set to 24bit192000Hz (studio quality). I changed it to run 16bit 96000Hz (studio quality) and POOF! no more lag/out of sync!

86 replies

May 18, 2013 12:56 PM in response to Sean Knudsen

Hello Apple? Are you listening?


Brand new Windows 8 I3 laptop, all drivers up to date, latest version of itunes, computer audio and itunes preferences the same audio setting (16bit, 44.1khz).....

Both movies I bought for a trip had audio lag just as stated in multiple posts here. My wife bought 2 other movies through B&N Nook and they played perfectly....guess where my money is going in the future?


PLEASE ADDRESS THE AUDIO LAG ISSUE

Jul 9, 2013 1:48 PM in response to Sean Knudsen

Thanks to Mr Me I was able to solve this problem on a Windows 7 Pro x64 PC and their when I called technicall support they tol'd me to just redownload The Dark Knight Rises which I did and, the audio lag was not their so thank you once again Mr Me you've made my day unlike apple customer support people who outside the technical department probably don't know anything tech and are just their to pick up the phone.

Jul 13, 2013 8:04 AM in response to Sean Knudsen

SO none of the fixes work. Had this problem with Itunes and Quicktime. Audio and video start out in sync then always get worse. Have resorted to trying to find a free virus free converter so I can just watch them on a thumb drive on my TV but Apple blocks everything but their music. NO luck so far no converters are free. If you own Apple stock I would sell these guys lack business sense when it comes to maintaining customers why can't such a obvious problem be addressed its like they make crap PC compatable software so you just buy Apple products once you get angry after they never work right. Anyways if someone comes up with a better fix thats not a duct tape job let me know.

Jul 16, 2013 10:09 PM in response to rodgers712

I'd like add my two cents: I found this Apple link that discusses video/audio sync issues with iTunes.


http://support.apple.com/kb/ts1718


Rented an iTunes movies and had the sync issues noted here. I tried adjusting all sorts of audio settings. Go down far enough and this link is telling you to disable Direct3D video acceleration in Quicktime for Windows Vista or Windows 7. The next suggestion is to Disable DirectX in QuickTime for Windows Vista or Windows 7. It tells you how to get to the QuickTime preferences.


Apple says they are going to refund my rental price... still waiting for that but am sure it will happen. Now my problem is that I don't want to rent another iTunes movie to try the above.... it might not work and am not sure if I can get my money back again.


So anyone care to try this - and let us know if it works?

iTunes audio/video drifts out-of-sync

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